CN103187161A - Primary winding of dry-type composite insulation current transformer and application of primary winding - Google Patents
Primary winding of dry-type composite insulation current transformer and application of primary winding Download PDFInfo
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- CN103187161A CN103187161A CN2013101309253A CN201310130925A CN103187161A CN 103187161 A CN103187161 A CN 103187161A CN 2013101309253 A CN2013101309253 A CN 2013101309253A CN 201310130925 A CN201310130925 A CN 201310130925A CN 103187161 A CN103187161 A CN 103187161A
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Abstract
The invention provides a primary winding of a dry-type composite insulation current transformer and the application of the primary winding. The primary winding comprises a U-shaped conductor, wherein capacitive main screens are lapwound on the U-shaped conductor; an insulation layer is arranged between every two capacitive main screens; and the capacitive main screens are lapwound on at least one end of the U-shaped conductor. By the adoption of the primary winding of the dry-type composite insulation current transformer, electric fields at two ends of the U-shaped conductor can be uniformly distributed effectively, and the electric fields of the whole U-shaped conductor can be further uniformly distributed, so that the partial discharge amount of the current transformer is greatly decreased, the electrical performance and the quality of the current transformer are improved, and the service life of the current transformer is prolonged; and the quantity of the capacitive screens and the number of the insulation layers can be effectively decreased, the production difficulty is greatly reduced, and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of current transformer, relate in particular to a kind of winding and application thereof of dry type compound inslation current transformer.
Background technology
The effect of current transformer is to be converted to the less secondary current of numerical value to the bigger primary current of numerical value by certain no-load voltage ratio; be used for protecting, purposes such as measurement; partial discharge quantity is the quality quality that influences current transformer, an important indicator of life-span length, and the Electric Field Distribution of current transformer unbalanced be the major reason of partial discharge quantity.A winding of existing 35-110KV dry type compound inslation current transformer generally comprises the conductor of U-shaped structure, outsourcing capacitor layers on U-shaped structure conductor (also claiming capacitance plate or main screen) and insulating barrier, capacitor layers and insulating barrier are multilayer, the current transformer of this structure, the unbalanced two ends that mainly are positioned at the U-shaped conductor of its Electric Field Distribution, therefore cause the partial discharge quantity of the end of conductor to increase, accelerate the aging of insulating barrier, have a strong impact on quality and the useful life of current transformer, in order to make the Electric Field Distribution equilibrium of U-shaped conductor, the insulating barrier of existing current transformer and the number of plies of capacitance plate are many, electric capacity main screen such as the dry type compound inslation current transformer of existing 35KV reaches 8, the electric capacity main screen of the dry type compound inslation current transformer of 66KV reaches 19, and the electric capacity main screen of the dry type compound inslation current transformer of 110KV reaches 27, the number of capacitance plate increases, the corresponding increase of the number of plies of insulating barrier, bring great workload therefore for the production of current transformer, production efficiency is low, and the distribution of the end electric field of current transformer is still unbalanced.
Therefore, an a kind of winding of new dry type compound inslation current transformer need to be proposed, not only can make the distributing equilibrium of electric field of end of U-shaped conductor, reduce the partial discharge quantity of current transformer, and can reduce number and the insulating barrier number of plies of electric capacity main screen, reduce the production difficulty, enhance productivity.
Summary of the invention
In view of this, a winding of a kind of dry type compound inslation current transformer provided by the invention, not only can make the distributing equilibrium of electric field of end of U-shaped conductor, reduce the partial discharge quantity of current transformer, and can reduce number and the insulating barrier number of plies of electric capacity main screen, reduce the production difficulty, enhance productivity.
A winding of a kind of dry type compound inslation current transformer provided by the invention comprises the U-shaped conductor, and described U-shaped conductor lap wound has the electric capacity main screen, is provided with insulating barrier between the described electric capacity main screen, and at least one end of described U-shaped conductor end lap wound has the capacitance terminal screen;
Further, the end, two ends of described U-shaped conductor is provided with the capacitance terminal screen;
Further, each end end of described U-shaped conductor is provided with two capacitance terminal screens, is provided with insulating barrier between described two capacitance terminal screen;
Further, longitudinally be crisscross arranged and overlap between the capacitance terminal of each end of the described U-shaped conductor screen;
Further, a winding of above-mentioned dry type compound inslation current transformer is applied to the dry type compound inslation current transformer of 35-110KV electric pressure;
The application of a winding of a kind of dry type compound inslation current transformer provided by the invention, a winding of described dry type compound inslation current transformer is applied to the dry type recombination current instrument transformer of 35KV, 66KV or 110KV electric pressure; A winding of the dry type recombination current instrument transformer of described 35KV electric pressure is provided with 3-5 electric capacity main screen; A winding of the dry type recombination current instrument transformer of described 66KV electric pressure is provided with 7-12 electric capacity main screen; A winding of the dry type recombination current instrument transformer of described 110KV electric pressure is provided with 10-16 electric capacity main screen;
Further, the electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 35KV electric pressure is 4;
Further, the electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 66KV electric pressure is 9;
Further, the electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 110KV electric pressure is 13.
Beneficial effect of the present invention: the setting of the capacitance terminal screen of a winding of dry type compound inslation current transformer of the present invention, can not only there be the Electric Field Distribution of the end, two ends that makes the U-shaped conductor effectively even, and can make the electric field of whole U-shaped body further be evenly distributed, greatly reduce the partial discharge quantity of current transformer, improve the electric property of current transformer, improve the quality of current transformer and increase the service life; Can effectively reduce the number of plies of electric capacity main screen and insulating barrier, greatly reduce the production difficulty, enhance productivity.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is structural representation of the present invention.
Fig. 2 is A place enlarged drawing among Fig. 1.
Embodiment
Fig. 1 is structural representation of the present invention, Fig. 2 is A place enlarged drawing among Fig. 1, as shown in the figure, a kind of dry type compound inslation current transformer provided by the invention, comprise U-shaped conductor 1, described U-shaped conductor 1 lap wound has electric capacity main screen 2, is provided with insulating barrier 3 between the described electric capacity main screen 2, and described U-shaped conductor 1 at least one end end lap wound has capacitance terminal screen 4; The setting of the capacitance terminal screen of a winding of dry type compound inslation current transformer of the present invention, can not only there be the Electric Field Distribution of the end, two ends that makes the U-shaped conductor effectively even, and can make the electric field of whole U-shaped body further be evenly distributed, greatly reduce the partial discharge quantity of current transformer, improve the electric property of current transformer, improve the quality of current transformer and increase the service life; Can effectively reduce the number of plies of electric capacity main screen and insulating barrier, greatly reduce the production difficulty, enhance productivity.
In the present embodiment, the end, two ends of described U-shaped conductor 1 is provided with capacitance terminal screen 4; The capacitance terminal screen all is set in the end, two ends of described U-shaped conductor 1, can make the electric field of electric capacity at two ends of U-shaped conductor all can evenly distribute, and the even distribution that is beneficial to the electric field of whole U-shaped conductor is improved, and reduces the partial discharge quantity of current transformer.
In the present embodiment, as shown in Figure 2, each end end of described U-shaped conductor 1 is provided with two capacitance terminal screens 4, is provided with insulating barrier 3 between described two capacitance terminal screen 4; Longitudinally be crisscross arranged and overlap between the capacitance terminal screen 4 of each end of described U-shaped conductor 1, described vertically referring to along the bearing of trend of the parallel portion of U-shaped conductor 1, this structure, be beneficial to the equiblibrium mass distribution of the electric field of the balanced and whole U-shaped conductor of Electric Field Distribution to the two ends of U-shaped conductor, make that the Electric Field Distribution at two ends of U-shaped conductor 1 is more balanced, can effectively reduce partial discharge quantity, improve the quality of products and increase the service life.
The application of a winding of a kind of dry type compound inslation current transformer provided by the invention, a winding of described dry type compound inslation current transformer is applied to the dry type recombination current instrument transformer of 35KV, 66KV or 110KV electric pressure; A winding of the dry type recombination current instrument transformer of described 35KV electric pressure is provided with 3-5 electric capacity main screen; A winding of the dry type recombination current instrument transformer of described 66KV electric pressure is provided with 7-12 electric capacity main screen; A winding of the dry type recombination current instrument transformer of described 110KV electric pressure is provided with 10-16 electric capacity main screen; The electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 35KV electric pressure is 4; The electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 66KV electric pressure is 9; The electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 110KV electric pressure is 13, the setting of capacitance terminal screen, make the number of electric capacity main screen of a winding of current transformer of 35-110KV electric pressure obviously reduce, thereby reduce the number of plies of insulating barrier significantly, reduce the production difficulty of product, enhance productivity, and make the Electric Field Distribution equilibrium of a winding of current transformer.
In the present embodiment, be example with the voltage of three kinds of models of LGBJ-35W2, LGBJ-66W2 and LGBJ-110W2, its electric capacity main screen quantity is respectively 4,9 and 13, through overtesting, and its partial discharge performance index such as following table:
Annotate: Um is system's ceiling voltage, and LGBJ-35W2 is 40.5kV, and LGBJ-66W2 is 72.5kV, and LGBJ-110W2 is 126kV.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. dry type compound inslation current transformer winding comprises the U-shaped conductor, and described U-shaped conductor lap wound has the electric capacity main screen, is provided with insulating barrier between the described electric capacity main screen, it is characterized in that: at least one end of described U-shaped conductor end lap wound has the capacitance terminal screen.
2. according to a winding of the described dry type compound inslation of claim 1 current transformer, it is characterized in that: the end, two ends of described U-shaped conductor is provided with the capacitance terminal screen.
3. according to a winding of the described dry type compound inslation of claim 2 current transformer, it is characterized in that: each end end of described U-shaped conductor is provided with two capacitance terminal screens, is provided with insulating barrier between described two capacitance terminal screen.
4. according to a winding of the described dry type compound inslation of claim 3 current transformer, it is characterized in that: longitudinally be crisscross arranged and overlap between the capacitance terminal screen of each end of described U-shaped conductor.
5. according to the application of a winding of the described dry type compound inslation of the arbitrary claim of claim 1 to 4 current transformer, it is characterized in that: a winding of described dry type compound inslation current transformer is applied to the dry type compound inslation current transformer of 35-110KV electric pressure.
6. according to the application of a winding of the described dry type compound inslation of claim 5 current transformer, it is characterized in that: a winding of dry type compound inslation current transformer is applied to the dry type recombination current instrument transformer of 35KV, 66KV or 110KV electric pressure; A winding of the dry type recombination current instrument transformer of described 35KV electric pressure is provided with 3-5 electric capacity main screen; A winding of the dry type recombination current instrument transformer of described 66KV electric pressure is provided with 7-12 electric capacity main screen; A winding of the dry type recombination current instrument transformer of described 110KV electric pressure is provided with 10-16 electric capacity main screen.
7. according to the application of a winding of the described dry type compound inslation of claim 6 current transformer, it is characterized in that: the electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 35KV electric pressure is 4.
8. according to the application of a winding of the described dry type compound inslation of claim 6 current transformer, it is characterized in that: the electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 66KV electric pressure is 9.
9. according to the application of a winding of the described dry type compound inslation of claim 6 current transformer, it is characterized in that: the electric capacity main screen of a winding of the dry type recombination current instrument transformer of described 110KV electric pressure is 13.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101309253A CN103187161A (en) | 2013-01-31 | 2013-04-16 | Primary winding of dry-type composite insulation current transformer and application of primary winding |
| PCT/CN2013/089594 WO2014169675A1 (en) | 2013-04-16 | 2013-12-16 | Primary winding of dry-type composite insulation current transformer, and application of primary winding |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320055059.1 | 2013-01-31 | ||
| CN201320055059 | 2013-01-31 | ||
| CN2013101309253A CN103187161A (en) | 2013-01-31 | 2013-04-16 | Primary winding of dry-type composite insulation current transformer and application of primary winding |
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| Publication Number | Publication Date |
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| CN103187161A true CN103187161A (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101309253A Pending CN103187161A (en) | 2013-01-31 | 2013-04-16 | Primary winding of dry-type composite insulation current transformer and application of primary winding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014169675A1 (en) * | 2013-04-16 | 2014-10-23 | 浙江天际互感器有限公司 | Primary winding of dry-type composite insulation current transformer, and application of primary winding |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195813A (en) * | 1983-04-22 | 1984-11-07 | Hitachi Ltd | Internal fixing device of current transformer |
| DE3512657A1 (en) * | 1985-04-06 | 1986-10-09 | MWB Messwandler-Bau AG, 8600 Bamberg | Gas-insulated high-voltage current transformer having a primary conductor of U-shaped construction |
| CN2497414Y (en) * | 2001-09-11 | 2002-06-26 | 徐文 | Inverted fully-dry type high-voltage current transformer |
| CN101719416A (en) * | 2009-11-13 | 2010-06-02 | 中国西电电气股份有限公司 | U-shaped current transformer with on-line insulation-monitoring function |
| CN201773690U (en) * | 2010-06-12 | 2011-03-23 | 中国西电电气股份有限公司 | Hairpin type current transformer used for high-voltage direct current |
| CN202076117U (en) * | 2011-03-14 | 2011-12-14 | 北京四方继保自动化股份有限公司 | Dry type current transformer having a small auxiliary screen |
-
2013
- 2013-04-16 CN CN2013101309253A patent/CN103187161A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59195813A (en) * | 1983-04-22 | 1984-11-07 | Hitachi Ltd | Internal fixing device of current transformer |
| DE3512657A1 (en) * | 1985-04-06 | 1986-10-09 | MWB Messwandler-Bau AG, 8600 Bamberg | Gas-insulated high-voltage current transformer having a primary conductor of U-shaped construction |
| CN2497414Y (en) * | 2001-09-11 | 2002-06-26 | 徐文 | Inverted fully-dry type high-voltage current transformer |
| CN101719416A (en) * | 2009-11-13 | 2010-06-02 | 中国西电电气股份有限公司 | U-shaped current transformer with on-line insulation-monitoring function |
| CN201773690U (en) * | 2010-06-12 | 2011-03-23 | 中国西电电气股份有限公司 | Hairpin type current transformer used for high-voltage direct current |
| CN202076117U (en) * | 2011-03-14 | 2011-12-14 | 北京四方继保自动化股份有限公司 | Dry type current transformer having a small auxiliary screen |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014169675A1 (en) * | 2013-04-16 | 2014-10-23 | 浙江天际互感器有限公司 | Primary winding of dry-type composite insulation current transformer, and application of primary winding |
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Application publication date: 20130703 |